The discovery of gold-rich ore in Luhihi in late February brought throngs of diggers to the site.
The accident took place in the afternoon in the Myslowice-Wesola mine, over 600 metres underground.
"Three years of falling lithium prices failed to incentivise sufficient investment into supply chains, leading to greater risks of price volatility as battery demand ramps up."
The nickel and stainless steel giant will provide 100,000 tonnes of nickel matte to Huayou Cobalt and battery materials maker CNGR Advanced Material.
